The Ascot was popularized in England, by the Prince of Wales in 1888.
The French had named it Plastron in 1882. By the end of the 19th century, it was considered the most exclusive form of neckwear for formal morning dress.
How to Wear an Ascot
Traditionally plain and black or striped, it is worn on the outside of a detachable collar, tied and eventually decorated with a stick pin.
While it was worn originally with a closed stiff collar, young men would wear open stiff collars and eventually flap collars and even turndown collars with an ascot.
In 1926, the Chelsea Flower show became a perfect exhibit of how influential the royals were upon the fashion of the day. George V for the first time wore a morning coat without spats. As a consequence, many of the men shed their spats on the spot, leaving the surrounding bushes full of the discarded accessory.